wisemapping-open-source/wise-webapp/src/main/java/com/wisemapping/util/ZipUtils.java

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License.  You may obtain a copy of the License at
*
*       http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* $Id: file 64488 2006-03-10 17:32:09Z paulo $
*/

package com.wisemapping.util;

import java.io.IOException;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
import java.util.zip.ZipEntry;

public class ZipUtils {

    public static String zipToString(byte[] zip) throws IOException {

        String result = null;
        if (zip != null)
        {
            final ByteArrayInputStream in = new ByteArrayInputStream(zip);
            final ZipInputStream zipIn = new ZipInputStream(in);
            zipIn.getNextEntry();

            byte[] buffer = new byte[512];

            int len;
            StringBuffer sb_result = new StringBuffer();

            while ((len = zipIn.read(buffer)) > 0) {
                sb_result.append(new String(buffer, 0, len));
            }

            zipIn.closeEntry();
            zipIn.close();
            result = sb_result.toString();
        }

        return result;
    }

    public static  byte[] stringToZip(String content) throws IOException {
        ZipOutputStream zip = null;
        ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
        ByteArrayInputStream in = new ByteArrayInputStream(content.getBytes());
        try {
            zip = new ZipOutputStream(byteArray);

            ZipEntry zEntry = new ZipEntry("content");
            zip.putNextEntry(zEntry);
            int bytesRead;
            byte[] buffer = new byte[8192];
            while ((bytesRead = in.read(buffer, 0, 8192)) != -1) {
                zip.write(buffer, 0, bytesRead);
            }
            zip.closeEntry();
        }        
        finally
        {
            if (zip != null)
            {
                zip.flush();
                zip.close();
            }
        }

        return byteArray.toByteArray();
    }
}